Isolation of phloem protein gene and expression analysis in celery
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    Abstract:

    The phloem proteins play important role in the maintenance of morphology, material transportation and wound protection in higher plant. Here, cDNA sequences of phloem protein were obtained using RT-PCR technology from two celery varieties ‘Liu He Huang Xin Qin’ and ‘Mei Guo Xi Qin’. The full-length of the two phloem-protein genes were 546 bp, and encoded 181 amino acid residues, respectively. The nucleotide sequences alignment showed that there were 3 loci differences: 88G/A, 399T/C and 489T/C. The deduced amino acid sequences showed that there was 1 residue difference, 30T/A. Prediction of the proteins molecular weight were 19 kDa, and pI were 9.18, respectively. The phloem-proteins from ‘Liu He Huang Xin Qin’ and ‘Mei Guo Xi Qin’ have highly identity with Lycoris aurea. There were 5 leucine and 4 tryptophan amino acid residues in the conservative position, respectively. Real time RT-PCR analysis showed that the genes expression were tissue specificity, which mainly expressed in the stem and root.

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History
  • Received:June 21,2012
  • Revised:August 01,2012
  • Adopted:November 29,2012
  • Online: April 24,2013
  • Published:
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